description = [[
Retrieves version information from the remote Network Data Management Protocol
(ndmp) service. NDMP is a protocol intended to transport data between a NAS
device and the backup device, removing the need for the data to pass through
the backup server. The following products are known to support the protocol:
* Amanda
* Bacula
* CA Arcserve
* CommVault Simpana
* EMC Networker
* Hitachi Data Systems
* IBM Tivoli
* Quest Software Netvault Backup
* Symantec Netbackup
* Symantec Backup Exec
]]

author = "Patrik Karlsson"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"version"}

require 'shortport'
require 'ndmp'

portrule = shortport.port_or_service(10000, "ndmp", "tcp")

local function fail(err) return ("\n  ERROR: %s"):format(err or "") end

local function vendorLookup(vendor)
	if ( vendor:match("VERITAS") ) then
		return "Symantec/Veritas Backup Exec ndmp"
	else
		return vendor
	end
end

action = function(host, port)
	local helper = ndmp.Helper:new(host, port)
	local status, err = helper:connect()
	if ( not(status) ) then	return fail("Failed to connect to server") end
	
	local hi, si
	status, hi = helper:getHostInfo()
	if ( not(status) ) then return fail("Failed to get host information from server") end
	
	status, si = helper:getServerInfo()
	if ( not(status) ) then return fail("Failed to get server information from server") end
	helper:close()
	
	local major, minor, build, smajor, sminor = hi.hostinfo.osver:match("Major Version=(%d+) Minor Version=(%d+) Build Number=(%d+) ServicePack Major=(%d+) ServicePack Minor=(%d+)")	
	port.version.name = "ndmp"
	port.version.product = vendorLookup(si.serverinfo.vendor)
	port.version.ostype = hi.hostinfo.ostype
	if ( hi.hostinfo.hostname ) then
		port.version.extrainfo = ("Name: %s; "):format(hi.hostinfo.hostname)
	end
	if ( major and minor and build and smajor and sminor ) then
		port.version.extrainfo = port.version.extrainfo .. ("OS ver: %d.%d; OS Build: %d; OS Service Pack: %d"):format(major, minor, build, smajor)
	end
	nmap.set_port_version(host, port, "hardmatched")	
end